Monkey-wrench.



i. M NsTK. MONKEY WRENCH.

APPLICATION FILED 001218, 1912.

Patented Oct. 20, 1914.

LITHQ. WASHINGTON. Dv C.

JOSEPH ivinnsin, or LYRA, TEXAS.

MONKEY-WRENCH.

Specification of Letters Patent. I

Patented Oct. 20, 1914:

Application filed October 18, 1912. Serial No. 726,585.

To all whom it may concern Be it knownthat I, Josnrn: MENsfn, citizen of the United States, residing at Lyra, in the county of Palo Pinto and'State of Texas, have invented certain new and useful Improvements in Monkey lVrenches, of which the following is a specification.

My invention relates to monkey wrenches of that type in which the movable aw of the wrench is so mounted upon the fixed jaw, that it may be readily shifted upon the disengagement of a detent from the fixed aw;

The primary object of my invention is the provision of a simple, effective and thoroughly operative wrench of this character so constructed that the movable jaw is held in any desired adjusted position with relation to the fixed jaw by means of a pawl or like device, this pawl having means whereby it may be disengaged upon pressure.

A further object of the invention is to provide a monkey wrench of the character described which is adapted either for engaging and turning nuts bolts or like objects having flat sides or which is adapted for engaging and biting upon pipe or other objectshaving rounded sides and which is further so constructed that it may be oscillated when in engagement with a pipe or like objects and will bite into the pipe upon a movement in one direction but will release the pipe upon a movement in the other direction.

A further object is to provide a wrench having a pivoted and a movable aw, and a latch for holding the movable jaw from any pivotal movement, said latchbeing shiftable to permit a pivotal movement of the jaw.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a side elevation of the wrench, this figure showing in dotted lines, the posi tion of the movable jaw when pivotally shifted; Fig. 2 is'a like view to Fig. 1,*but showing the movable aw broken away in parts to illustrate the internal construction;

Fig. 3 is an elevation of the rear face of the wrench. i j

Referring to these drawings, 2 designates one member of the wrench comprising a movable jaw carrying a handle 3 at one end and a jaw 4 at its opposite end, this jaw being formed upon its inner face with serrations 5, the teeth or serrations 5 being inclined toward the butt of the jaw.

Mounted upon the shank of the fixed jaw and slidable thereon isa movable jaw comprising a body portion 6 which is disposed in'parallel relation to the shank of the fixed jawand which is provided with loop members 7 which ,extendaround the finedjaw.

a tooth end 9 adapted to engage with a series of ratchet teethlO formed on the inner face of the shank 2. These ratchet teeth. incline outward and toward the handle 3. The dog 8 has a downwardly extending tail 11 which is outwardly curved for the accommodation of a spring 12 theend of the spring being supported in the end of the member 6by :means of a screw or likedevice 13. spring-12 forcesthe tail 11 of the dog against the inner end of a push pin 14 which projects OUtOf an opening 15in the rear This face of the member 6. It willbe obvious that the spring 12 will normally hold the dog in engagement with the ratchet teeth 10,

but that when the push pin isforced inward by, the thumb of the operator, the dog will be released. from its engagement with the teeth 10 and the movable jaw 6 may then be shifted longitudinally along the shank 2. The body 6 of the movable jaw is rounded at its upper end and pivotally connected to this body 6is a jawmember 16 angularly bent as at 17 to form the jaw proper, the inner face of which is serrated or toothed as at 18. The inner face of the jaw member 16 is also serrated as at 19, the serrations 18 extending toward the back of the wrench and j the serrations 19 being inclined downward. These serrations 5, 18 and 13 are adapted to give a firm grip upon an nut, bolt, pipe or other object to which the wrench is applied. The upper end of the body 6 is rounded as at 20 and the lower end of the jaw member 16 is bifurcated so asto lift off this rounded and laterally reducedportion 20. The aw member 10 is pivoted to the body 6 by means of a bolt or pivot pin 21. i

[Mounted upon the jaw spring 22. Preferably this spring at one end is attached to the head of the jaw member 16 by means of a bolt or pin This member-82 extends along the rear face of the member 16 and at its lower end is in wardly bent or angled as at 24 and projects into a recess formed in the body 6. Mounted-in the opening of said recess in such position that it may be turned in against the angular end 24 of the spring 22 is a latch 27 which is pivotedat 28 to a pivotpin-29.

member 16 is a When the latch27 is turned in the position shown in Fig. 3, the jaw member 16 is held from any but a very slight pivotal movement. lVhen, however, the jaw member 27 is turned outward to the position shown in dottedlines in Fig. 1 it will be withdrawn from beneath the angular end of the spring and as a consequence the jaw lnember 16 may be turned upon its-pivot to the position shown in Fig. 1, against the force however ofv the spring 22, which acts to normally urge the jaw member 16 in the position shown in Fig. 2, by engaging the upper wall of the recess. It is to be understood that the teeth on the latch 27 are not of such length as will interfere with the moving of the latch inward from the dotted line position in Fig. l to the full line position shown in Fig. 2, or moving this latch outward, and that there is just enough engagement between the teeth and the end of the spring as will sufiice" to engage the end of the spring with the latch.

-- retracts the dog and the body 6 may then be adjusted longitudinally upon the shank 2 to any desired position. As soon as the pink") is released, the spring 12 will force the dog back in engagement with the teeth 10 and lock the jaws in their adjusted position.

When using the device as a pipe wrench it will be obvious that when the wrench is turned in one direction the jaws will clamp the pipe, but that when turned in the other direction the jaw members 16 will turn upon its pivot to the position shown in dotted lines, thereby releasing its grip upon the pipe.

in order to permit the latch 27 to be withdrawn from its engagement with the angular end of the spring 22, the latch is provided at its sides with scores or grooves whereby the finger of the operator may readily engage the latch, The latch is held in frictional engagement with the side walls of the opening leading to the recess'26 by means of a coil spring 30 which surrounds the pivot pin 28' and forces the latch into frictional engagement with the side of the casing formed by the hollow body 6.

Having thus described the invention what is claimed is:

l. A wrench of the character described including a shank having a fixed jaw on one end, a member slidably mounted upon the shank, means for adjusting said member along the shank, a jaw member pivoted to the first named member and extending parallel to and behind the shank and having a jaw eoacting with. the first named jaw, a spring mounted upon the jaw member and resiliently resisting a pivotal movement of the pivoted jaw member outward and away from the shank, and means for limiting the pivotal movement of said jaw member, said means being movable into or out of operative position.

2. A wrench of the character described, including a shank having a fixed jaw on one end, a member slidably mounted upon the shank, means for adjusting said member upon the shank, a jaw member pivoted to the first named member and having a jaw co-aeting to the first named jaw, a spring mounted upon the jaw member and extending into a recess on the first named member and a latch movable into and out of engagement with the spring to limit or permit a pivotal movement of the jaw member.

3. A wrench of the character described including a shank having a fixed jaw on one end, a member slidably mounted upon the shank, means for adjusting said member upon the shank, a aw member pivoted to the sliding member and extending parallel to the shaft and having a jaw eoaeting with the first named jaw, a spring mounted upon the jaw member and extending parallel thereto, and a latch pivotally mounted upon the slide and movable into position to engage said spring and limit the pivotal movement of the aw outward from the shank.

r. A monkey wrench of the character described ineluding a shank formed with a head at one end having a serrated face, the inner face of the shank having ratchet teeth, a member slidably engaged with the shank, a pawl pivotally mounted in said member, a spring for forcing the pawl into engagement with the latch teeth, a jaw member pivotally mounted upon said first named member and extending over the first named head to form a movable head, the inner face of said head and jaw member having ratchet teeth inclined. inward and downward, a spring attached to the jaw member and having an angular end projecting into a recess in the first named member and a latch pivoted in the said recess and adapted to be turned to engage the angular end of the spring.

In testimony whereof I afiix my signature in presence of two witnesses.

JOSEPH MENsiK.

Witnesses Anors VAJA, JOHN Now/iii.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

